中北大学学报（自然科学版）Issue(4)：468-472,5.DOI:10.3969/j.issn.1673-3193.2014.04.021
基于单片机技术的火花塞离子电流检测系统研究
Study on Spark Plug Ion Current Detecting System Based on SCM Technology
摘要
Abstract
Based on the diagnosis method of ion current ,a new ionic current detection system was designed , which included spark plug that was used as the sensor directly and MC 9S12 series of high performance micro-controller that was the core control unit .The signal of engine combustion was detected by microcontroller and ion current loop ,and the signals could be online acquired and revealed through the interface ,by isolating high-voltage ,high-frequency signal automatically with the high-voltage silicon stack and wavelet de-noising tech-nique .Then the state parameters could be distilled effectively .The ionic current signal during engine opera-tion was investigated in the experiment .It took about 20 259μs and acquisition 1 000 point .Two peak of ion current interval is about 5ms .The late timing of the ion current peak is about 42° ,consistent with the com-bustion situation of the actual cylinder .It is concluded that the system is accurate in the ion current acquisition by compared with oscilloscope (OSC) acquisition .关键词
火花塞/离子电流/采集系统/单片机Key words
spark plug/ion current/acquisition system/SCM分类
能源科技引用本文复制引用
周乃君,陈文杰,夏彬彬,林乔..基于单片机技术的火花塞离子电流检测系统研究[J].中北大学学报（自然科学版）,2014,(4):468-472,5.基金项目
湖南省科研条件创新专项 （）
